I have something loose in the dash area. I looked up how to take the middle dash speaker out. Easy to do. I looked inside the big opening with a flashlight and couldn't see anything that could make the noise. I did look at the 1980s little speaker in the odd plastic plate and it's made of old paper with a bubble. The little magnetic is about the size of a silver dollar almost as thin. I was going to replace it with a jbl 4 inch nice speaker. I need an adapter to make it fit. I don't want to cut up the plate holding it in there. The system sounds good but has anyone looked at the other speakers? I hope they aren't cheap paper cones.